Improvement in flanged covers for sheet-metal ware



JAMES FALL OW S.

Flanged Covers for Sheet MetaILWare N0.123,338, Patented Feb. 6,1872

' WITNESSES-L INVENTOR';

NITED STATES FFICE.

JAMES FALLOWS, OF PHILADELPHIA, PENNSYLVANIA.

Specification forming part of Letters Patent No. 123,338, dated February 6, 1872.

Specification describing certain Improvements in Adjusting Flanged Covers to Sheet- Metal Vessels, invented by JAMES FALLOWS, of the city of Philadelphia, in the State of Pennsylvania.

My invention relates to the manufacture of sheet-metal covers for vessels in such a manner that the tapering flange, which is intended to slip down and fit accurately within the mouth of the vessel, can be readily adjusted to fit as desired by simply pressing the cover firmly downward into the mouth before the said flange is soldered fast at its lapping ends, and to the disk or top plate with which it is connected. The common practice consists in first fitting the tapering flange to the mouth of the particular vessel, then withdrawing it and holding the lapping ends together between the fingers, soldering the said ends permanently together, and finally securing it to the under side of the covering-plate by the usual interlapping of their turned edges and soldering them together. By this mode the flange will fit the mouth of the one particular vessel, but will not probably fit more than one in ten or twenty of other vessels of the same lot, and, therefore, each vessel must have its particular lid singly adjusted, soldered, and applied at the time; the object of my invention being the production of sheet-metal covers or lids having their respective tapering flanges and interlaps adjusted together in their relative positions and left without any soldering, so that they may be put in sale as an artiole of manufacture, to be afterward adjusted to the mouths of vessels and then soldered, as will be hereinafter more fully explained.

Figure 1 is a plan view of the strip of sheet metal cut in the curved form required to give the taper desired in the flange of a sheet-metal lid or cover. Fig. 2 represents the same strip as bent into the form of a short hollow conical frustum, the ends of the strip lapping, and the edge of the larger end of the frustum turned outward. Fig. 3 represents the flange and the top plate of the lid, adjusted together by lapping the outer edge of the plate upon the turned edge of the flange.

The flange A is out out in the usual curved form to suit the taper required, bent into a ring with lapping ends, or short hollow conical frustum, and the edge a of the larger end of said frustuin turned outward, all in the usual well-known manner it is then sprung into the top plate B, which has its outer edge 0 turned downward to receive it and, finally, the sad edge b turned down flatly upon the turned edge a of the flange A in the usual manner and thus left, ready for subsequent adjustment and soldering to suit any vessel of a lot it may be intended for.

In applying this cover or lid to a vessel it is intended that the mouth of the vessel shall readily admit the entrance of the smaller end of the frustum, and then, by the strong pressure of the workmans hand on the top of the lid, forcing the flange inward, and thus causing its diameter to contract to suit the mouth of the vesselthe lapping ends a. of the flange A slipping on each other, and the turned edge a of the same slipping inward accordingly, and being held to the adjustment required by the friction to which it is subject between the top plate B and its lapping edge I), while the lid is drawn out and the joints permanently soldered.

It will therefore be readily understood that these covers or lids can be manufactured and put on sale, to be afterward adjusted and soldered to suit any vessel of a lot having nearly the same-sized mouth, and that such adjustment and soldering will greatly facilitate the production of this class of sheet-metal vessels.

I claim as my invention- As an improved article of manufacture, a sheet-metal lid or cover having the tapering flange A made adjustable, substantially in the manner and for the purpose hereinbefore set forth and described.

JAMES FALLOWS.

Witnesses:

BENJ'. MORISON, WM. H. MORISON. 

